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Need help troubleshooting!

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Old Dec 30, 2010 | 09:28 AM
  #1  
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Default Need help troubleshooting!

Hey guys need some input. I have a 97 Roadking and the last few times I rode it I get this popping sound that comes from the carb area? It happens when I'm in and around 100km-120km. Any speed before 100km or above 120km I never get that pop. It definitely isn't coming from my pipes so I've ruled out running to lean or rich.

TIA
 
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Old Dec 30, 2010 | 09:38 AM
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Is this EFI or carbed? In general, popping from the carb is a sign of too lean. You could have an intake leak. If carbed, you could have a gunked up main or intermediate jet, depending on what carb you have.

Popping from the exhaust pipes during deceleration can be an exhaust gas leak.
 
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Old Dec 30, 2010 | 09:45 AM
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I agree that popping out the carb is lean.

Cooler weather requires a richer mixture sometimes.
 
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Old Dec 30, 2010 | 09:54 AM
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Dr.Hess it's carburated. How many turns out would you recommend? Also if I had a leak how would I check or what visible signs would there be?
 
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Old Dec 30, 2010 | 11:06 AM
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Spray WD40 around the intake seals while the bike is running and see if the engine changes RPM. If it revs slightly then you have an intake seal leak.
 
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Old Dec 30, 2010 | 11:50 AM
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Yes, as topfuel7 says. Carb cleaner works too, and listen for the RPM change, up or down. Spray a little on all the joints between the carb and the head while running.

As for adjusting the carb, I don't know CV carbs, just S&S and Megasquirt EFI. If this is a new problem, I would think that something is wrong and needs fixing, versus just needing to be richened it up and mask the symptoms. Start with a good cleaning (with a soak) and go from there.
 
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Old Dec 30, 2010 | 01:27 PM
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I think your float bowl is going empty with sustained rpms. Check float height.
Does the engine run well in town or slower on secondary highways?
Check your plug colour after a normal ride going 60mph for an hour. That might tell you where your fuel/air mixture is!
Hatch.
 
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Old Dec 30, 2010 | 02:07 PM
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Thanks guys I really appreciate the input.
 
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Old Jan 9, 2011 | 05:30 PM
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Did you ever figure out what was wrong?
 
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Old Jan 10, 2011 | 04:56 AM
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I'm thinking that since its at higher speeds, your running out of fuel. I'd check the pet-**** screen.. With the ethanol in Georgia, I've had some and heard a couple of buddies have a few problems..
 
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